Mammaliaformes Rowe 1988
Count: [g†g] 1c;24o;125f;1081g; ‡1o;6f;43g; †24o;301f;4057g;1s
   [crown] Class Mammalia Linnaeus, 1758 - mammals
  Count: [g†g] 24o;125f;1081g; ‡1o;6f;43g; †21o;294f;4034g;1s
     Subclass Theriiformes Rowe, 1988 see Division Theriiformes Rowe, 1988
    Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †21o;294f;4031g;1s
       Infraclass Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg, 1995 see Clade Holotheria Wible, Rougier, Novacek, McKenna & Dashzeveg 1995
      Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †20o;277f;3936g;1s
         Superlegion Trechnotheria McKenna, 1975 see Clade Trechnotheria McKenna 1975
        Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †20o;274f;3932g
           Legion Cladotheria McKenna, 1975 see Clade Cladotheria McKenna 1975
          Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †18o;269f;3910g
             Sublegion Zatheria McKenna, 1975 see Clade Zatheria McKenna 1975
            Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †16o;262f;3884g
               Infralegion Tribosphenida McKenna, 1975 see Subclass Boreosphenida Luo, Cifelli & Kielan-Jaworowska, 2001
              Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †16o;258f;3877g
                 [crown] Supercohort Theria Parker & Haswell, 1897 - therians see Subclass Theria Parker & Haswell, 1897
                Count: [g†g] 22o;123f;1078g; ‡1o;6f;43g; †16o;256f;3874g
                   Cohort Marsupialia Jameson, 1818 - marsupials
                  Count: [g†g] 5o;15f;73g; ‡1f;3g; †2o;28f;237g
                     Magnorder Ameridelphia Szalay, 1982 see Clade Ameridelphia Szalay 1982
                    Count: [g†g] 2o;2f;17g; †1o;16f;129g
                       Order Didelphimorphia Gill, 1872
                      Count: [g†g] 1f;14g; †1f;42g
                         Family Didelphidae Gray, 1821 - American opossums
                        Count: [g†g] 14g; †38g
                           Subfamily Didelphinae Gray, 1821
                          Count: [g†g] 11g; †11g
                             Tribe Monodelphini Talice, de Mosera & Machado, 1960
                            Count: [g†g] 6g; †2g
                               Subtribe †Zygolestina Marshall, 1987
                              Count: [†g] †1g
                                 Genus †Zygolestes Ameghino, 1898
                                Count: -